Out of panic he sought a quiet corner (5)
I believe the answer is:
niche
'a quiet corner' is the definition.
'niche' can be an answer for 'corner' (synonyms). I am not sure about the 'a quiet' bit.
'out of panic he sought' is the wordplay.
'out of' indicates the answer is hidden within the clue.
'NICHE' is hidden within 'panic he sought'.
Can you help me to learn more?
(Other definitions for niche that I've seen before include "Comfortable position" , "Special location" , "somewhere comfortable" , "comfortable situation" , "ideal position" .)